摘要
盘管释热换热器浸没式布置在熔盐单罐蓄热器内可实现低成本的蓄放热。盘管换热器取热方式会直接影响系统的释热性能。通过数值模拟研究了换热器取热方式对单罐蓄热系统释热性能规律的影响,同时分析了释热过程中熔盐侧流场变化。结果表明,换热器上进下出的取热方式能够提高盘管换热器的出口温度、单罐释热功率及释热效率,研究结果为熔盐单罐蓄放热系统设计提供了理论依据。
Low cost heat charge and discharge can be realized by immersion arrangement of a helically coiled heat exchanger in molten salt single storage tank. Heat removal modes of the helically coiled heat exchanger will directly affect the heat discharge process of the storage system. Simulations were performed for two heat removal modes which include upper-lower path and lower-upper path. For different heat removal modes in the heat discharge process, the law of heat discharge performance of the molten salt single storage tank is given, and the change of flow field of molten salt side is analyzed. The results show that upper-lower path for the helically coiled heat exchanger can improve the transient out temperature, transient heat transfer rate and heat discharge efficiency. The research results provide a theoretical basis for the design of the molten salt single tank heat storage and discharge system.
作者
施素丽
鹿院卫
于强
吴玉庭
SHI Suli;LU Yuanwei;YU Qiang;WU Yuting(College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2019年第3期857-864,共8页
CIESC Journal
基金
国家自然科学基金项目(51576006)
国家重点研发计划项目(2017YFB0903603)
关键词
浸没式换热器
取热方式
释热过程
熔盐单罐
对流
传热
流动
immersed heat exchanger
heat removal mode
heat discharge process
molten salt single tank
convection
heat transfer
flow
作者简介
第一作者:施素丽(1992—),女,硕士研究生,1689517645@qq.com;通信作者:鹿院卫(1971—),女,博士,教授,luyuanwei@bjut.edu.cn.
